ASTM A269 TP 316/316L Seamless Tubes

ASTM A269 TP 316/316L Seamless Tubes

ASTM A269 TP 316/316L Seamless Tubes are molybdenum-bearing austenitic stainless steel tubes designed for superior corrosion resistance in aggressive environments. These tubes are widely used in instrumentation systems, heat exchangers, and chemical processing industries.

Grade 316 provides excellent resistance to pitting and crevice corrosion, especially in chloride environments, while 316L (low carbon version) offers improved weldability and enhanced resistance to intergranular corrosion.

Specifications

Standard	ASTM A269
Grade	TP 316 / TP 316L
Manufacturing Process	Seamless (Cold Drawn)
Outside Diameter	6 mm to 50.8 mm
Wall Thickness	0.5 mm to 6 mm
Length	Up to 6 Meters / Custom Length
Surface Finish	Annealed & Pickled, Bright Annealed
End Type	Plain End

Key Benefits

• Superior Corrosion Resistance: Excellent resistance to chlorides and harsh chemicals.
• Enhanced Pitting Resistance: Molybdenum addition improves resistance in marine and chemical environments.
• Low Carbon Content (316L): Minimizes carbide precipitation during welding.
• High Strength & Durability: Reliable performance in demanding conditions.
• Smooth Surface Finish: Ideal for precision instrumentation and sanitary systems.
• Good Fabricability: Easy to form, bend, and weld.

Chemical Composition (Typical)

Element	316 (%)	316L (%)
Carbon	0.08 Max	0.03 Max
Chromium	16.0 – 18.0	16.0 – 18.0
Nickel	10.0 – 14.0	10.0 – 14.0
Molybdenum	2.0 – 3.0	2.0 – 3.0

Applications

• Instrumentation Tubing
• Chemical Processing Equipment
• Heat Exchangers
• Marine Applications
• Pharmaceutical Industry
• Food Processing Equipment

Quality Testing

• Hydrostatic or Air Underwater Testing
• Ultrasonic Testing (UT)
• Eddy Current Testing
• Flattening Test
• Dimensional Inspection

Conclusion

ASTM A269 TP 316/316L Seamless Tubes provide superior corrosion resistance, excellent mechanical strength, and dependable performance in aggressive environments. Their versatility and durability make them a preferred choice for chemical, marine, and instrumentation applications.